The main aim of the project was the prior qualification of motor-vehicle steels with a view to the development of lighter mechanical components and the selection of more suitable materials for their manufacture. The qualification process involved fatigue tests (elastic and elastoplastic) and racture-mechanics tests, which were conducted either on traditional steels or on newly developed materials. The following industrially produced materials, which are cast as ingots, were examined: three hardening and tempering steels - including one manufactured in three forms (standard, resulphurized, Ca-treated) -, three micro-alloy steels in the form of bars and sections and two hot-rolled HSLA strip steels. All the fatigue-test results suggest a definite possibility of replacing hardened and tempered steels by micro-alloy steels of apropriate composition and structure. Stress-useful life curves, which provide a better indication of the behaviour of of the materials in use, reveal that, in the case of elastoplastic strength in particular, the performance of micro-alloy steels is superior or at least equal to that of hardenee and tempered steels of equivalent strength. A more comprehensive approach to the question of actual behaviour in use must also take account of the true significance of toughness, which must be defined with reference to component type.


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    Title :

    Promotion of the use of steels in motor vehicles through evaluation of their properties in relation to design for finite life (1st phase). Final report


    Additional title:

    Foerderung der Anwendung von Staehlen fuer den Kraftfahrzeugbau durch Bewertung ihrer Eigenschaften in bezug auf die Konstruktion fuer eine finite Lebensdauer (1. Phase). Abschlussbericht


    Contributors:
    Farsetti, P. (author) / Blarasin, A. (author)

    Publication date :

    1987


    Size :

    77 Seiten, 30 Bilder, 17 Tabellen, 28 Quellen


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English







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